. >>> right now, we continue to follow breaking news on news 4 midday. the fbi is investigating an early morning shooting that killed a border patrol agent and injured another in arizona. it happened near the u.s./mexico border. the wounded agent was air lifted to the hospital and is expected to survive. >>> president obama and mitt romney are preparing for their first debate. the president is in nevada. his rival in denver, where tomorrow's debate will take place. runni innin inning mates come p battleground states. paul ryan wrapped up an event in clinton, iowa. s american airlines customers are dealing with unhappy pilots. seats broke mid flight. >> the passenger seats came loose out of the floor. >> eight planes grounded after three incidents where an entire row of sts came loose. twice, it happened on the same plane. the airline says it could be a defect in a certain model of seats. passengers say this issue on top of decreasing on-time arrivals is unacceptable. >> if they don't fly, i don't have a status on another airline. it's an issue for me. >>